The research and experimentation (R&E) tax credit has long been the subject of criticism. Some argue that if the goal is more research and innovation, it’s better to increase direct federal funding of research. Others argue that the credit is not effective, that companies would do the research in any case. Some object the very notion of using tax policy to influence private sector behavior, preferring instead a more ‘‘neutral’‘ tax code. Still others point to what they see are a host of design flaws in the current credit,